This is a super blanking grommet, which means it is designed to fit over a hole in a surface to prevent the ingress of dust and dirt. It is made of black polyethylene and has a diameter of 25mm. It is suitable for use in a variety of applications.Easy to use and can be installed with a screwdriver. It is also resistant to water, oil, and grease. · · · Can be installed with a screwdriver · · Resistant to water, oil, and grease · · Material: Polyethylene · · Operating temperature range: -20°C to +80°C · · Made from high-quality EPDM rubber · · UV resistant